These two presentations cover the performance of pipeline systems by obtaining the probability of the false alarm, PFA, and the probability of the detection, PD were presented at the NWGLDE meeting in Sacramento, CA. These presentations which are in PowerPoint and Excel, explain how the different statistics are obtained using the data from the EPA protocol “Standard Test Procedures for Evaluation Leak Detection Methods: Pipeline Leak Detection Systems”. The two presentations are called:p77_78_test_mean_2; nwg09_pres
The boiling temperature of water decreases as the pressure decreases or as the altitude increases. For example, water boils at 212 F at or near the sea level. In Oxford, MS, where the elevation is about 505 ft., water boils at 211 F. In Golden, CO, where the elevation is about 5600 ft, water boils at 201 F.
We have contributed a program to Mathematica that obtains the boiling temperature of water for varying elevation by just moving a knob called the “Slider”. Below is the web page for our demo in Mathematica:
http://demonstrations.wolfram.com/BoilingPointOfWaterAsAFunctionOfAltitude/
Please note “Slider” and dynamic calculations are extremely powerful tools. Mathematica and dynamic analysis certainly could be imbedded in our industry and help us obtain various results both very efficiently and very quickly. Instead of obtaining one result for inputting one value, we can obtain continuous answers by just moving the knob “Slider”.
Using the conservation of mass and the conservation of energy to independently check the accuracy of the amount of the fuel delivered to an underground storage tank(UST). This is an extremely powerful tool and will tell us if the fuel delivered (at the given temperature) is the same amount and at the same temperature as those reported by the truck operator.
This program is called: temp_volume_finder, inputplus_td.txt from jul, 27,09
A topic that seems to come up in just about every NWGLDE meeting is the presence of a crack (orifice) on the side of a UST, and the amount of the liquid that escapes from this hole. This topic also came up in the recent Technical Panel Meeting organized by Battelle. Our computer program answers this question when the height of the fuel, the size of the crack, and some other variables are varied.
Mathematica published this program and it is now online. We are very pleased and honored by having our program published in Mathematica’s Demonstrations Project and we think a lot of engineers, researchers, and field engineers will use it to obtain the exact amount of leakage for various heights, different “crack sizes”, and various coefficient of discharge. To really see this program in action a user needs to have Mathematica installed or download the Mathematica Player. Mathematica Player and all the demos are free and may be downloaded at anytime.
The Demonstration Project may be downloaded from:
http://demonstrations.wolfram.com/FlowOfFluidThroughAHoleInATank/
Note that leakage is a function of height, “h” so above may be applied to both vertical and horizontal tanks.